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What You Need to Know
What Is This Product and What Does It Do?
A headphone amplifier takes a signal from your source — a DAC, a preamp, a streamer — and gives it enough power to drive a pair of headphones well. Most source components have a basic headphone jack built in, but it’s an afterthought circuit: low-power, often noisy, and not designed for demanding headphones.
The BHA-1 is Bryston’s full answer to that problem. They did not add a headphone circuit to an existing product. They built a dedicated amplifier from scratch — applying the same engineering behind their legendary full-size power amplifiers directly to headphone listening.
Bryston describes the BHA-1 as a miniature power amplifier. That’s accurate. The same principles that drive their 7B, 14B, and 28B monoblock amplifiers — Class A circuitry, dual-mono construction, high-current output — are all present inside the BHA-1. The headphones just happen to sit on your ears instead of across the room.
Pure Class A — Six Discrete Amplifiers
The BHA-1 uses six fully discrete Class A operational amplifiers, custom-designed by Bryston. There are three per channel. Class A means the output transistors stay fully active on every part of the waveform. There is no switching, no crossover region, and no transition distortion. It is the most linear way to run an amplifier.
In balanced mode, each headphone driver is powered by two of those amplifiers at once — one carrying the positive signal, one carrying the inverted signal. When they combine at the driver, the result is twice the signal voltage compared to single-ended operation. Bryston uses the same approach in their monoblock power amplifiers.
Dual-Mono Construction
Dual-mono means the left and right channels are fully independent circuits — separate amplifiers, separate power, no shared components between them. There is no crosstalk between channels. Whatever is happening on the left side of the signal has no effect on the right. This is the same principle behind Bryston’s separate-chassis monoblock amplifiers.
Female XLR Outputs — Three Headphone Connections at Once
This version uses female XLR connectors on the balanced headphone outputs. Standard balanced headphone cables with male XLR plugs connect directly — no adapters needed. Three outputs sit side by side on the front panel and can all be used at the same time:
- A 4-pin stereo XLR — the most common balanced headphone connector
- Dual 3-pin XLR jacks — separate left and right channel connections
- A ¼-inch (6.35mm) single-ended TRS jack for standard headphone cables
The single-ended jack uses one amplifier per channel instead of two, so it delivers roughly half the voltage swing of the balanced outputs. Balanced is the way to get the most from the BHA-1.
Volume, Gain, and Balance Controls
The volume potentiometer is sourced from Noble and laser-trimmed at the factory. Laser trimming means the left and right channels track at matched levels across the full volume range — most important at low listening levels where mismatches are most noticeable.
A front-panel toggle selects gain: 14dB (low) or 20dB (high). This lets you match the BHA-1 to your source’s output level, so the volume control sits in a comfortable, usable range. A separate balance control — rare on headphone amplifiers — allows fine left/right adjustment to suit different headphone designs or listener preference.
Three Inputs — Plus a Built-In Preamplifier
A front-panel toggle selects between three inputs: a balanced XLR pair, an unbalanced RCA pair, and a 3.5mm mini-jack for portable sources. All connectors are gold plated throughout.
On the rear panel, a pair of balanced XLR outputs lets the BHA-1 drive a power amplifier and speakers. It handles two inputs in preamp mode — balanced XLR or RCA. No separate preamplifier needed.
TONEAudio’s reviewers confirmed it works cleanly in this role. They tested it with amplifiers from Pass Labs, PrimaLuna, and Van Alstine and found it contributed no noise of its own even at high volumes.
Power Supply and Build
The BHA-1 runs a high-quality internal analog power supply built around a toroidal transformer. For those who want more, the optional Bryston MPS-2 external power supply replaces it. The BHA-1 is convection cooled — no fans, no noise. A 12V trigger input powers it on and off automatically with your system.
The chassis is machined and anodized aluminum, built in Dwight, Ontario, Canada — the same factory as Bryston’s reference power amplifiers. Every unit goes through individual testing before it ships. The BHA-1 carries Bryston’s 10-year parts-and-labor warranty.
What Are Reviewers Saying?
W. Jennings reviewed the BHA-1 after extended listening with a range of headphones. He called it a “must listen for anyone looking for a final train stop on the personal audio express” and was puzzled it had taken him so long to hear it.
Jeff Dorgay awarded the BHA-1 both a Product of the Year and an Exceptional Value Award. He called its character “clean, dynamic, neutral and to-the-point,” praised its preamplifier performance, and confirmed it contributed no noise of its own driving tube and solid-state power amplifiers.
Phil Gold called the BHA-1 an “outstanding bargain in balanced headphone amps.” He said he would not have been surprised if it sold for $2,500, that at its actual price it was “a steal,” and his verdict was simply: “Buy one today.”
Carlo Lo Raso called the BHA-1 “an impeccably designed and solidly built amplification device.” His conclusion: if you’re in the market for a top-class headphone amplifier without a built-in DAC, “you really cannot go wrong with choosing the BHA-1. Highly recommended.”
Who Is This Best For?
Listeners ready to stop compromising — If you’ve been using the headphone output on a DAC, receiver, or preamp, you’re leaving performance behind. The BHA-1 shows you what your headphones can actually do.
Owners of demanding headphones — Planar magnetic headphones (Audeze, HiFiMAN) and high-impedance dynamic headphones (Sennheiser HD 800, Beyerdynamic T1) need real power and control. With 2 watts per channel and 20V into 600 ohms, the BHA-1 drives them properly.
Balanced headphone users — If you have balanced-terminated cables or plan to recable, the BHA-1’s female XLR outputs — 4-pin and dual 3-pin — are purpose-built for you.
Headphone listeners who want speaker options later — The rear XLR outputs let the BHA-1 double as a preamplifier. One purchase covers both use cases.
Long-term thinkers — The BHA-1 is a purely analog device. It does not go obsolete when streaming technology changes. It has been in production for over a decade and is still a current product. Bryston’s 10-year warranty backs it up.
Earned Recognition
The BHA-1 has earned award recognition since its introduction in 2012 — and keeps earning new praise more than a decade later. That staying power is rare in the headphone amplifier category.
Category: Headphone Amplifiers
TONEAudio’s Product of the Year recognizes components the publication considers among the most significant and best-performing introductions of the year — at any price point.
Category: Headphone Amplifiers
TONEAudio’s Exceptional Value Award recognizes components that deliver a level of performance the publication considers remarkable relative to their asking price — products that stand out in their category as strong value.
Watch It in Action
Bryston BHA-1 — Features & Walk-Through with Bryston’s Craig Bell
Audio Advisor sat down with Craig Bell of Bryston for a detailed look at the BHA-1 — covering the circuit design, inputs and outputs, gain settings, and what makes it different from typical headphone amplifier designs.
Pairs Well With
The BHA-1 is a pure analog amplifier — it needs a source to feed it a signal. Here are the pairings that make the most sense.
- Bryston BDA-3 DAC — A natural all-Bryston digital headphone system. The BDA-3’s balanced XLR output connects directly to the BHA-1’s balanced input, keeping the signal fully balanced from your digital source to your headphone driver.
- Bryston MPS-2 External Power Supply — Replaces the BHA-1’s internal power supply with a dedicated external unit. Nearly identical in form factor — it stacks cleanly underneath the BHA-1. An upgrade for those who want to take performance further.
- DAC / Streaming DAC — A high-quality external DAC feeding the BHA-1 via balanced XLR makes for an outstanding all-analog headphone path from digital sources. Browse our full DAC selection to find a match at this level.
- Premium Headphones — The BHA-1 was built to make demanding headphones perform at their best. If you’re ready to step up to planar magnetic or high-impedance headphones, this is the amplifier to pair them with. Call us and we’ll help you match.
Not sure where to start? Call us at 800-942-0220 — we’re happy to help you build the right system around the BHA-1.
Features & Specifications
Pure Class A Output Stage — No Compromises
The BHA-1 uses six fully discrete Class A operational amplifiers, custom-built by Bryston — three per channel. Class A means the output transistors are always active. They never switch off during any part of the waveform. There is no crossover distortion, no switching noise, and no transitions in the signal path.
Balanced Differential Drive — Double the Voltage
In balanced mode, two of the three amplifiers per channel work together to drive each headphone driver. One carries the positive signal; one carries the inverted signal. When they combine at the driver, the voltage doubles compared to single-ended operation.
This design also rejects common-mode noise — interference picked up along the cable that both conductors see equally. Balanced drive handles that far more effectively than single-ended operation does.
Dual-Mono Construction — Full Channel Independence
The left and right channels are completely separate circuits from input to output. No shared components, no shared power between them. This eliminates crosstalk — signal bleed from one channel into the other. Dual-mono is the same principle that motivates Bryston’s separate monoblock power amplifiers, now applied to headphone listening.
Noble Laser-Trimmed Volume Control and Balance
The volume pot is sourced from Noble and laser-trimmed at the factory for precise left/right channel matching. Mismatched controls track unevenly at low volumes — laser trimming removes that problem. The BHA-1 also includes a dedicated balance control. This is rare on headphone amplifiers and useful for fine-tuning image placement or matching headphone channels.
Selectable Gain — 14dB or 20dB
A front-panel toggle selects between two gain settings. 14dB works well with sources that have a strong output level. 20dB is better for sources with a lower output, so the volume knob has a comfortable, usable range. Getting the gain setting right makes a real difference in how precisely you can control your listening level.
Headphone Outputs — Female XLR, Three at Once
This version uses female XLR connectors. Standard balanced headphone cables with male XLR plugs connect directly — no adapters needed. All three outputs can be used simultaneously. For high-impedance headphones, the BHA-1 delivers 20 volts into 600 ohms — enough for the most demanding studio and audiophile designs.
THD at 32 ohms and 100mW is less than 0.003%. Intermodulation distortion is less than 0.001%. These are very low figures — the circuit adds almost nothing of its own to the signal.
Three Inputs — Balanced, RCA, and Portable
A front-panel toggle selects the active input. Three choices: balanced XLR pair, unbalanced RCA pair, and 3.5mm mini-jack for phones, tablets, or portable players. Input impedance is 10kΩ unbalanced and differentially balanced (+15kΩ/–5kΩ). All connectors are gold plated for lasting, corrosion-free contact.
Rear-Panel Balanced Preamplifier Outputs
A pair of balanced XLR outputs on the back lets the BHA-1 function as a two-input analog preamplifier. Connect it to a power amplifier and speakers and you have a full speaker system — no separate preamp needed. TONEAudio confirmed it drives long cable runs cleanly and contributes no noise when used this way.
Power Supply, Cooling, and Control
The internal power supply uses a toroidal transformer — the same topology as Bryston’s full-size amplifiers. The optional Bryston MPS-2 external supply replaces it for those who want more. The BHA-1 is convection cooled: no fans, no moving parts, no noise. A 12V trigger input allows automatic power-on with your system.
Measurements
THD: less than 0.003% at 32Ω and 100mW, 20Hz–20kHz. IM Distortion: less than 0.001%. Signal-to-noise ratio: greater than 105dB. Frequency response: 20Hz–20kHz, ±0.1dB. Power output: 2 watts per channel at 32Ω. Output impedance: 2 ohms per op-amp driver.
Build and Finish
Machined and anodized aluminum chassis, silver faceplate, 17 inches wide. The 17-inch model is compatible with optional rack-mount ears. Built by hand in Dwight, Ontario, Canada — the same facility as Bryston’s reference power amplifiers. Every unit is individually tested before shipping. Covered by Bryston’s 10-year parts-and-labor warranty.
Quick-Reference Specifications
| Amplifier Class | Pure Class A, fully discrete |
| Output Topology | Dual-mono; 6 discrete Bryston op-amps (3 per channel) |
| Power Output | 2W per channel @ 32Ω |
| High-Impedance Output | 20V into 600Ω (667mW) at 0.001% THD+N |
| Low-Impedance Output | 4V into 32Ω (500mW) at 0.001% THD+N |
| THD (32Ω, 100mW, 20Hz–20kHz) | <0.003% |
| IM Distortion | <0.001% |
| Signal-to-Noise Ratio | >105dB |
| Frequency Response | 20Hz–20kHz, ±0.1dB |
| Output Impedance | 2Ω per op-amp driver |
| Gain | Selectable: 14dB (low) or 20dB (high) |
| Sensitivity — High Gain (20dB) | 70mV in = 100mW into 50Ω |
| Sensitivity — Low Gain (14dB) | 140mV in = 100mW into 50Ω |
| Input Impedance | 10kΩ (unbalanced); +15kΩ/–5kΩ (balanced) |
| Inputs | 1 × Balanced XLR pair; 1 × Unbalanced RCA pair; 1 × 3.5mm stereo mini-jack |
| Headphone Outputs | 1 × 4-pin stereo XLR (female); 2 × 3-pin XLR (female, L/R); 1 × ¼-inch TRS |
| Preamplifier Outputs | 1 × Balanced XLR pair (rear panel) |
| System Control | 12V trigger input (5–12V AC/DC @ 10mA) |
| Power Supply | Internal analog (toroidal transformer); optional Bryston MPS-2 external supply |
| Cooling | Convection (fanless) |
| Faceplate Width | 17 inches |
| Dimensions (H × W × D) | 2.71” × 17” × 11.10” (69mm × 432mm × 282mm) — without feet |
| Weight | 8 lbs (3.6kg) — unit only; 11.7 lbs (5.3kg) shipping weight |
| Finish / Color | Silver anodized aluminum faceplate |
| Rack Mount | 17” compatible with optional rack-mount ears |
| Country of Manufacture | Canada |
| Warranty | 10 years, parts and labor |
Frequently Asked Questions
What else do I need to use the BHA-1?
The BHA-1 is a headphone amplifier and preamplifier — it does not include a DAC or streamer. You’ll need a source component to feed it a signal: a DAC, a CD player, a preamplifier, or a portable player. Connect via the balanced XLR, RCA, or 3.5mm input. The BHA-1 handles the amplification from there. If you also want to drive speakers, add a power amplifier connected to its rear XLR outputs.
Does the BHA-1 work with my headphones?
Most likely, yes. The BHA-1 works with both balanced and single-ended headphones. It delivers 2 watts per channel at 32 ohms and 20 volts into 600 ohms — enough for even the most power-hungry planar magnetic and high-impedance dynamic headphones. The two gain settings (14dB and 20dB) let you match it to sensitive in-ear monitors or hard-to-drive cans alike. If you’re unsure, call us at 800-942-0220 and we’ll help you check the match.
What does “female XLR” mean on this version?
It refers to the shape of the XLR connectors on the balanced headphone outputs. Female XLR sockets accept standard male XLR plugs — the kind found on most balanced headphone cables. You connect your cable directly without any adapters. This is the current standard version of the BHA-1.
Can the BHA-1 be used as a preamplifier for a speaker system?
Yes. The rear-panel balanced XLR outputs send signal to a power amplifier and speakers. The BHA-1 handles two inputs in preamp mode — balanced XLR or RCA. Reviewers at TONEAudio tested it this way with amplifiers from Pass Labs, PrimaLuna, and Van Alstine and found it worked cleanly and quietly. It’s a real preamplifier, not a workaround.
What is the difference between the 14dB and 20dB gain settings?
Gain controls how much the BHA-1 amplifies the incoming signal. Use 14dB (low) if your source has a high output level — this keeps the volume knob in a usable range and gives you finer control. Use 20dB (high) if your source is quiet or your headphones are hard to drive. Wrong gain for your setup makes the volume control awkward; the right gain makes it feel natural.
Does the BHA-1 have a remote control?
No. The BHA-1 uses front-panel toggle switches and knobs — no remote is included. This is a deliberate design choice that keeps the signal path simple and analog. The 12V trigger input lets it power on automatically with your system, so at least you won’t need to reach for a power button.
What is the optional MPS-2 power supply?
The Bryston MPS-2 is an optional external power supply that replaces the BHA-1’s internal supply. It is nearly identical in size and shape to the BHA-1 and stacks cleanly underneath it. Bryston designed it specifically for this application. It’s an upgrade for listeners who want to take every last bit of performance from the platform. Contact us for current MPS-2 pricing.
What warranty does the BHA-1 carry?
The BHA-1 is covered by Bryston’s 10-year parts-and-labor warranty. This covers the amplifier itself. Note that some older marketing materials and reviews reference a 20-year warranty — Bryston’s current published warranty for this product is 10 years. Confirm the current warranty terms at bryston.com/service-and-warranty before purchasing if this is important to your decision.
Does the BHA-1 include a DAC?
No. The BHA-1 is a purely analog device — it has no built-in DAC or digital inputs. This is an intentional design choice. Digital technology changes quickly. Keeping the BHA-1 analog means it won’t become outdated when DAC or streaming technology evolves. Pair it with a separate DAC of your choice and upgrade that independently whenever you like.
What’s in the Box
- Bryston BHA-1 Balanced Headphone Amplifier — Silver, 17-Inch Faceplate
- IEC AC power cable
- Owner’s manual
- Warranty and registration documentation
Packing contents may vary. Confirm the complete list with Bryston or Audio Advisor before publishing. Call us at 800-942-0220 if you need a specific item confirmed before you buy.
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Want to learn more about headphone amplifiers, how to match an amp to your headphones, or the difference between balanced and single-ended connections? Visit our Audio Advisor Learning Center for guides, tips, and expert advice.
