HHB Classic 80 Pentode Tube Dual Channel/Stereo Mic Preamp

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ITEM DESCRIPTION:

This HHB Classic 80 tube-based two-channel preamp is one of the more versatile preamps around. Originally priced around $1500 new, they have become cult classics and are becoming harder to find.   Key Features: All-tube gain stages; transformer input stage; three-position high- and low-pass filters; output attenuator; tube drive indicator; instrument input. 

The Classic 80 is a stereo tube mic preamp that treats the signal to three passes through the glowing glass. The trip through the Classic 80 goes something like this: transformer-coupled input stage, EF86 pentode main gain stage, two 12AX7 triode stages for gain and trim, solid-state balanced output stage. A front panel instrument input bypasses the input transformer.

The Classic 80 uses a stepped gain knob marked off at 20, 30, 40 and 50 dB of gain. This feeds a gain trim knob continuously variable between -12 dB and +12 dB; this knob has a center detent for unity gain. A large output level knob attenuates the signal before the output, with maximum output at the full clockwise position. 

Along the way, the signal passes through second-order (12 dB/octave) low-pass and high-pass filters. Each filter knob has three frequency settings in addition to off. For the high-pass filter, these frequencies are 50 Hz, 100 Hz and 150 Hz. Low-pass frequencies include 5 kHz, 10 kHz and 15 kHz.

Both channels offer switchable phantom power, while Channel 1 also offers a phase reverse switch. Presiding over all the knobs is a backlit VU meter that shows output level. Additional level indicators include a tube drive LED and second peak LED. The tube drive indicator begins to glow at 0 dB, growing progressively brighter up to +12 dB. The HHB’s peak indicator lights when a signal gets within 5 dB of clipping.

Around back, the Classic 80 offers unbalanced 1/4″ outputs as well as balanced XLR jacks. A switch on the back panel lets the user select between +4 dBu and +18 dBu at the XLR output and lifts the 1/4″ output from -10 dBu to +4 dBu.

Will be boxed up tight for safe transit during shipping.

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TERMS

BIDDING AND SHIPPING ARE TO CONFIRMED MEMBERS ONLY.

WE SHIP ALL OVER THE WORLD. DOMESTIC BUYERS IN THE UNITED STATES AND INTERNATIONAL BUYERS MUST HAVE CONFIRMED ACCOUNTS.

Shipping within the lower 48 (the Continental United State) ship via UPS or FedEx Ground. Buyers in Alaska, Hawaii, and Puerto Rico, please make contact for a shipping quote. ALL international shipments ship via USPS EMS International Express. ALL shipments are fully insured and require signature when delivered. INTERNATIONAL BUYERS need to make contact for shipping price quote (as shipping will be different from country to country).

All shipments MUST be delivered to the buyer's confirmed physical address 

(no PO Boxes or AFO/FPO deliveries).

We cannot release shipments to any alternative address. Any attempt to reroute a shipment will trigger the item's interception and return, and a 20% service/restocking fee will be assessed at time of refund. For both our safety and your peace of mind, there is no exception to these buying/shipping terms.

NOTE: Returns are accepted for the rare occasion when an item arrives damaged or is not as described. We do not issue refunds merely because one changes their mind or decides the item isn't really what they want.

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