Two speakers are sitting on the floor next to each other.

Custom Work

We have a 100% original semiconductor compliment for these products to ensure the original performance of the audio signature.

Any audio product coming from the factory is produced to perform within the general specifications of the engineer. This, however, is done with a budget. Simple modifications can be done to any existing piece of audio equipment to improve overall sonic performance and stability. Our technicians have more than 45 years of experience in engineering, modifying, and improving almost any analog audio product. These modifications can be as simple as using Polypropylene bypass capacitors in the signal path to noise-reducing techniques in the power supply, as well as stiffening the supply using larger filter capacitors for higher current capabilities into low impedance loads.

Carver Power Amplifier Modifications

Carver amplifiers have more than enough power to drive any speaker, including speakers with difficult-to-drive, low-impedance loads such as the well-known Infinity Kappa series, with ease!

It is worth noting that better sound does not necessarily come from more power alone. For example the M-1.5t is rated at 350 watts per channel, yet in reality, the average output of these amplifiers exceeds their rated output by nearly double at 600 watts per channel with a total headroom of 750 watts per channel. To acquire 3db of gain, you would need to double the output of the amplifier to about 1200 to 1400 watts per channel. The reason is that the human ear functions in a logarithmic fashion; when it comes to sound pressure changes, you need to have a 3dB threshold to hear wide bandwidth changes in sound pressure.

A group of green circuit boards and batteries.

Improvements to the Signal Path

Updating the components in the front end will improve the overall clarity of the amplifier. The gain in most of the M series and The TFM series have been noted to have a notable difference in gain between the left and right channels. We address this issue using a unique approach to the calibration of these masterpieces of audio engineering. Most of the M series amplifiers, use trim pots for calibration. We recommend the process of “permical.” This process is tedious, to say the least! The end result is that all stages from bias, gain, supply voltage, and VU meter ballistics remain permanently calibrated for the life of the amplifier. Other upgrades include our custom circuit boards designed by Hi-Tech Audio. These aid in power supply, protect circuits, and signal path improvements. Low ERS electrolytic capacitors with perfect margins for ultra-long life and performance. Opamp sonic devices are far more common than their through-hole counterparts. These innovative boards will allow us to use the latest Opamp technologies and ensure the continued ability to Service and upgrade these units.

AL3 and the Original Carver Amazing Loudspeakers Upgrades

A close up of the controls on an amplifier

When restoring the Amazing Loudspeaker crossovers, we use SOLEN metalized polypropylene capacitors. With the electrolytic capacitors, we hand-pick and match values, as these do not have the tight tolerances of the polypropylene device and can vary as much as 20% versus 3%.

There is an option to utilize air wound inductors in the low-pass filter of the crossover. This change will improve both power handling and overall performance, as air wound inductors do not change inductance under high-power applications as iron core inductors do.

These changes will optimize the sound of any speaker system, including the Carver Amazing. The only downside is that matching the DCR of the coil is size! It takes a much larger gauge of wire to keep the DCR low to keep the efficiency the same, and the impedance will be more stable. Devices used in our upgrades & modifications

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The semiconductor brands we use in our upgrades are from verified vendors - no knockoff or fake cheap Chinese service parts such as semiconductors, capacitors, or integrated circuits.

  • ANALOG DEVICES
  • FAIRCHILD
  • INTERNATIONAL RECTIFIER
  • ON SEMI
  • TEXAS INSTRUMENTS
  • TOSHIBA
  • MOTOROLA
  • ST MICRO

Capacitor brands vary depending on the application needed

  • CHEMI-CON
  • JANTZEN
  • KEMET
  • NICHICON
  • PANASONIC
  • RUBYCON
  • SOLEN
  • VISHAY SPRAUGE