AF’s Weblog

February 23, 2012

Ampeg GVT52 112 & GVT15H Review

Filed under: Amps, Guitar reviews — Tags: , , , , , , , , — audiofanzine @ 6:41 am

The name Ampeg makes bass players’ ears stand up and tails wag. There is a good reason for that: launched during the 1969 NAMM, their SVT amp still has a leading position in the hearts and minds of most bass players. However, today we won’t review a bass amp, but an amp conceived for six-string players. Focus on the GVT52-112 & GVT15H.

Even though Ampeg has released guitar amps in the past, they are still pretty unknown and even underestimated. What’s more, bass products clearly take the lion’s share in the manufacturer’s catalog: bass heads, bass combos, Heritage Series, SVT Pro, Portaflex… So we were surprised to discover a brand new guitar amp range at the Musikmesse 2011! Called GVT, this series looks a lot like the old SVT monsters (300 watts in those days…) and will seduce Ampeg and vintage gear fans.

With their chrome control panel, buttons evoking a time most people under 40 didn’t know, and old-school logo, these new GVT amps have an appealing look and ride the wave of vintage gear for guitar players. One can easily imagine the sound coming out of the speakers just by looking at them and immediately feel nostalgic.

Let’s start with simple things: the small 15-watt head and its speaker cabinet.

Small But Tough

Ampeg GVT52 112 et GVT15H

I don’t know about you, but personally I can’t resist tiny stacks! They look lovely, don’t they? With its compact size (9.8″x18″x10″) and light weight (27.4 lbs), this amp head is perfect for home use while being easily transportable. The speaker cabinet is equipped with a Celestion Vintage 30 12″ woofer, weights 30.8 lbs and has similar dimensions 16.5″x18x11″. Both devices together weight less than 60 lbs, plus they are easier to transport than the combo: just hold the amp head with your left hand and the speaker cabinet with your right hand, stand upright and you are ready to go.

The two devices look pretty sturdy: 15-mm plywood, thick leather handle and metal front panel. The knobs feel very firm and inspire a lot of confidence, the switches feel pretty tight as well.

And what’s inside?

A Well-Furnished Mind in a Small Head

Ampeg GVT52 112 et GVT15H

The GVT15H features only one all-tube channel (class-A push-pull technology). The preamp stage has a pair of 12AX7 tubes while the power amp uses two 6V6GT tubes. You can halve the output power and get 7.5 watts instead of 15 (15 W = tetrode; 7.5 W = triode).

The Baxandall three-band EQ provides standard Bass, Middle and Treble settings. On the front panel you’ll also find the gain, volume and reverb controls. The Treble setting allows to cut/boost up to 12dB @ 5kHz, the Bass control is set to work on 80Hz, while the Middle knob allows you to cut up to 6dB @ 800Hz or boost up to 10dB @ 2kHz. The spring reverb and the rear FX loop can be disabled with a footswitch. You can connect 4, 8 or 16 ohm speakers to the amp using the appropriate rear output.

And that’s it for the overview of this extremely straightforward amp head. But how does it sound?

C-c-c-c-combo Breaker

Same look, same manufacturing quality, so let’s move on to the interesting parts right away.

Ampeg GVT52 112 et GVT15H

This time, you get two channels, 50 watts of output power and an all-tube class-AB amplifier stage. The amp uses three 12AX7 tubes at the preamp stage and two 6L6GC tubes for the power amp. The triode operating mode is still available and allows you to halve the output power (25 watts). Weight (52.2 lbs) and dimensions (19.5″x24″x11″) are still reasonable. The internal speaker is a 12″ Celestion Custom Design. A good-quality footswitch is provided and it allows you to select a channel and activate the booster. Notice that it is possible to add a second footswitch to enable/disable the internal spring reverb and the FX loop.

The first channel produces only clean sounds and bears a lot of resemblance to the 15-watt head: same three-band Baxandall EQ, gain and volume controls. To switch to channel 2, you can use the small switch on the front panel or the footswitch.

Ampeg GVT52 112 et GVT15H

The EQ in channel 2 is slightly different: the mid boost is set at 1kHz, instead of 2kHz like in channel 1. All other controls are identical. The reverb setting and (of course) the master volume are common to both channels. Even if the combo offers a bit more than the head, it’s still pretty straightforward. There’s an LED that lights up red in standby mode and green when the amp is ready to be played — nice little detail.

On the rear panel you’ll find an effect loop (TS jacks), two footswitch connectors (only one is provided), and the outputs for 4, 8 or 16 ohm speakers. If you’re not sure about this last point, the user’s manual clearly explains the impedance to be used depending on the number of speakers and their impedance. Before listening to the sound samples, notice that the booster is accessible only from the footswitch and is common to both channels.

To read the full detailed article with sound samples see:  GVT52 112 & GVT 15H Reviews

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