Guitar Amp Repair - Mods - Jensen Speakers

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We also stock George L's cables, Mojotone Extension Cabinets, amps and effects on consignment, and more.  Stop by the shop and see what we have!

Guitar Amp Modifications and Tweaking

 

Would you like to have your silverface Fender converted to Blackface specification?  Click here for more info. Fender Blackfacing

How about a better bias adjustment circuit for improved tone and longer power tube life for your silverface Fender amp?  This is included in the "blackfacing" conversion or can be done to many other amps.

Would you like to get rid of that "ticking" sound in your vintage Fender vibrato circuit?  $15

Would you like more intense Tremolo in you Princeton Reverb.  Then can be done without changing the character of the effect. $15

We can add spring reverb to your Fender Deluxe, Bandmaster, Concert or Showman.  You'll have to give up the vibrato function and the "Normal" channel that you probably never use anyway.  The new reverb circuit will feature bass and treble controls.  Cost is around $225 to $265 depending on whether you want it to be footswitchable or not.  Note: there is not enough room in the head cabinets to add the tank without excess humming so you'll have to find a bigger cabinet or mount the tank outboard of the head cabinet.

Would you like to have previous modifications removed to put your amp back in stock condition?

Do you want more gain, more treble, less treble, more bass, less distortion, more distortion, more “sparkle”? 

Other available mods available for many but not all amps;

Reverb on the "normal" channel. 

We can convert many solid state rectified amps to tube rectified or tube rectified to solid state rectification.  This changes the dynamics and headroom of the amp.

Triode/Pentode Switch (1/2 power switch)- This allows to you reduce your output power level to about 1/2 of normal.  This usually means a reductions 20-30% in output volume and a slight loss in treble response.  Price ranges from $65-$150 depending on amp model but is $80 for most amps.

Post phase inverter master volume control - This allows variable output volume while keeping your preamp gain turned up for a "cranked up" sound at lower volume.  Price from $65 and up depending on amp model.  $75 for most amps.

Ever wish your Fender Deluxe Reverb had more volume and headroom?
Bring in a Blackface or Silverface Fender Twin Reverb and let us convert it to a "Super Deluxe Reverb".  Price:  $575     This includes the following:
     Replace both transformers
     Install 4 new 6V6 output tubes.
     Install octal tube socket for tube rectifier
     New GZ34 Rectifier tube
     Re-locate transformers, choke and bias pot
     All new power supply and bias supply capacitors (Sprague Atom)
     Several circuit changes as necessary

 

These and other modifications may be available depending on amp make and model.