I recently bought a strange amp from a local antique shop. It's got a "Supernova" emblem on it (not to be confused with the Star Supernova practice amp), but I'm pretty sure it's a one-off, custom model. It's got two channels, with two inputs for each channel, and a "stereo" input (five inputs total). It has a switch for polarization, but it also has a three pronged power cable, which looks to be original. The knobs make a substantial amount of scratching and crunching when turned, so I assume that the pots just need to be cleaned/replaced. It's got 6 pre-amp tubes (most of which are GEs), and two power tubes, both of which are GE model NL 188-5 made in 1984, as far as I can tell. Now, I'm really enjoying the sound of the amp (esp. the Tremolo) and it looks cool, but it doesn't get terribly loud. Since the amp was probably a one-off, it's essentially not labeled at all. Is there any way I can find out what wattage this amp is designed to handle, thus figuring out whether the tubes need to be replaced or that maybe it's just not designed to get louder? Many thanks in advance for your help, and I'll try to answer any questions you have.

Do you have any pics of the amp?

I'm in the process of borrowing a friend's camera, so they should be up within the day.

Discuss

Great looking amp. I'm guessing came from the late or mid 70's. I noticed the speaker says Marlboro. I used to own a small PA with the name Marlboro years ago.

I'm thinking the company marlboro had something to do with this amp maybe an employee creation? Marlboro amps were offered years ago from Montgomery Ward catalogs kinda like Silver Tone guitars in sears catalogs.

With 2 power tubes it 50 watts or less.