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| UK Distribution Hub: | 20 |
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2-year warranty & 30-day money-back guarantee included
If you decide your order isn't suitable for any reason you can return it - just let us know within 30 days of receiving it. Please keep hold of all the original packaging until you're sure you want to keep the order.
Eligibility for Money Back Guarantee
For hygiene and software licensing reasons, some items are only eligible for our Money Back Guarantee if they are returned to us unused and sealed in the original packaging with all software still "unregistered."
Details of exclusions are shown within the product descriptions.
Products include:
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We can collect your return for a small fee, or you can send it back to us yourself. The collection fee can be found in the returns information on each product's page on Gear4music.
In the unlikely event that any item in this order is faulty, damaged or incorrect on receipt, notify us within 14 days and we'll arrange a free collection.
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This table provides an overview of your statutory consumer rights, compared with our standard returns policy and optional extended money back guarantee and warranty.
| UK & Europe | EU Standard | Gear4music Standard | Gear4music Optional |
|---|---|---|---|
| Return Period | 14 days | 30 days | up to 180 days |
| Standard delivery charges refunded? | Yes | Yes | Yes, up to 30 days |
| Upgraded delivery charges refunded? | Standard costs only | Standard costs only | Standard costs only |
| Free collection on cancellation | No | No | Yes, up to 30 days |
| Free collection if defective, delivered damaged or incorrect item | Yes, within 14 days | Yes, within 14 days | Yes, within 30 days |
We are unable to accept returns of any custom made items designed to work together as a unique package and some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging. For full information on our returns policy, please refer to our returns and refunds information guide.
Key Features
The Lambden Audio HD2 Pro Hum Destroyer is designed for tackling ground-loop noise in balanced two-channel audio setups. Its ground lift switch disconnects pin 1 across both XLR outputs, helping you reduce unwanted hum and buzz caused by ground loops. Two balanced XLR and 6.35mm TRS combo inputs provide flexible connections for mixing consoles, audio interfaces, preamps, and other balanced line-level equipment.
On the output side, dual balanced XLR connections let you feed powered speakers, recorders, mixers, or audio interfaces. This makes the HD2 Pro easy to integrate into studio and live setups where ground-loop noise is getting in the way. And with a specified 20 Hz - 20 kHz frequency response and distortion of no more than 0.005 percent at 1kHz, it's designed to handle your audio signal across the audible frequency range.
Product Ref: 344966
Hum or buzz can become a problem when connected audio equipment creates a ground loop. The HD2 Pro gives you a straightforward way to address it, with a single ground lift switch controlling both balanced XLR outputs. Select GND for standard operation, where pin 1 of each output remains connected to ground. When ground-loop noise occurs, switching to LIFT disconnects pin 1 from ground on both outputs. This gives you quick control over grounding without needing to rearrange your wider audio setup, making the HD2 Pro useful when connecting balanced line-level equipment.
Two independent signal paths let you connect a pair of balanced sources through one compact unit. This suits stereo setups as well as systems where two separate balanced line-level signals need routing. The connection diagram on page three of the manual shows a console feeding both HD2 Pro inputs, with its two outputs then connected to a pair of monitor speakers. That makes the unit suited to common monitoring setups where unwanted ground-loop hum or buzz needs addressing across both channels.
Each input uses a balanced combo connector, accepting either XLR or 6.35mm TRS connections. That flexibility makes it easier to slot the HD2 Pro into an existing setup without being tied to one connector format. You can connect balanced line-level sources including mixing consoles, audio interfaces, and preamplifiers. Dual balanced XLR outputs then provide straightforward connections to powered speakers, recorders, mixers, audio interfaces, and other professional equipment with balanced XLR inputs, handy when your setup combines several different types of audio hardware.
The HD2 Pro is specified with a frequency response spanning 20Hz to 20kHz, covering the audible frequency range while you address ground-loop noise. Distortion is rated at no more than 0.005 percent at 1kHz, while the specified crosstalk figure is at least -97dB. Its output impedance is 8.7kohm. Together, these specifications give you clear technical information for assessing how the unit will fit into your signal chain, whether you're connecting a mixing console to powered monitors or incorporating it between other compatible balanced line-level devices.
Lambden Audio delivers professional-grade audio electronics designed for both studio recording and live performance. Used by musicians, engineers and producers, Lambden Audio products are built to perform reliably in demanding environments.
