This was part of JBLs Synthesis line, top of the line gear, class AB amp. What makes it different from other amps is that each channel has its own power supply: The S650 provides a continuous 130 Watts per channel through each of 5 channels for 8 ohm and 190 watts for 4 ohm loads. Discrete Power Supplies and Amp Sections: The S650 has a discrete power supply and amplifier section for each channel, which solves many problems inherent in single power supply designs. As a result, S650 has virtually no cross talk between channels, and extremely high degree of channel separation. Furthermore, each channel operates independently, allowing the amplifier to continue operating in the event that one channel goes out. Level Controlled Forced Fan Air Cooling: The S650 utilizes a fan to cool the five amplifier channels and to ensure long term reliability. To make sure that no fan noise is injected into the listening area, a feedback control circuit has been employed that only activates the fan when the output of any channel exceeds a certain level, so that the audio masks the fan noise.I bought this recently from the original owner but its just too heavy for my rack and no room on the floor. This is a beast, so local pickup is preferred, since it did not come with the original boxes. Ill ship at your cost (Ill need to buy a sturdy box).

This was part of JBLs Synthesis line, top of the line gear, class AB amp. What makes it different from other amps is that each channel has its own power supply: The S650 provides a continuous 130 Watts per channel through each of 5 channels for 8 ohm and 190 watts for 4 ohm loads. Discrete Power Supplies and Amp Sections: The S650 has a discrete power supply and amplifier section for each channel, which solves many problems inherent in single power supply designs. As a result, S650 has virtually no cross talk between channels, and extremely high degree of channel separation. Furthermore, each channel operates independently, allowing the amplifier to continue operating in the event that one channel goes out. Level Controlled Forced Fan Air Cooling: The S650 utilizes a fan to cool the five amplifier channels and to ensure long term reliability. To make sure that no fan noise is injected into the listening area, a feedback control circuit has been employed that only activates the fan when the output of any channel exceeds a certain level, so that the audio masks the fan noise.I bought this recently from the original owner but its just too heavy for my rack and no room on the floor. This is a beast, so local pickup is preferred, since it did not come with the original boxes. Ill ship at your cost (Ill need to buy a sturdy box).

Used but 100% functional - and massively powerful - five channel surround amp taken from a custom home theater job. I sold the entire kit but kept this for my home theater. Crushes the five channel NAD I had - audiophile w music. Phenomenal sound. Most likely a rebranded Crown. Cannot be touched by budget or receiver amps. Definite signs of use but don’t underestimate how powerful and beautiful this amp is. It is heavy. And it is large - and thats why I am selling. I had to eliminate the home theater and am now only two channel. Check my feedback!!

Used but 100% functional - and massively powerful - five channel surround amp taken from a custom home theater job. I sold the entire kit but kept this for my home theater. Crushes the five channel NAD I had - audiophile w music. Phenomenal sound. Most likely a rebranded Crown. Cannot be touched by budget or receiver amps. Definite signs of use but don’t underestimate how powerful and beautiful this amp is. It is heavy. And it is large - and thats why I am selling. I had to eliminate the home theater and am now only two channel. Check my feedback!!

Used but 100% functional - and massively powerful - five channel surround amp taken from a custom home theater job. I sold the entire kit but kept this for my home theater. Crushes the five channel NAD I had - audiophile w music. Phenomenal sound. Most likely a rebranded Crown. Cannot be touched by budget or receiver amps. Definite signs of use but don’t underestimate how powerful and beautiful this amp is. It is heavy. And it is large - and thats why I am selling. I had to eliminate the home theater and am now only two channel. Check my feedback!!

JBL SYNTHESIS S650 POWER AMPLIFIERselling as listed for parts or repair , does not power on and no further test done no warranty due to be sold for parts or repair final sale no return no refundlocal pick up only , local pick up only

Used but 100% functional - and massively powerful - five channel surround amp taken from a custom home theater job. I sold the entire kit but kept this for my home theater. Crushes the five channel NAD I had - audiophile w music. Phenomenal sound. Most likely a rebranded Crown. Cannot be touched by budget or receiver amps. Definite signs of use but don’t underestimate how powerful and beautiful this amp is. It is heavy. And it is large - and thats why I am selling. I had to eliminate the home theater and am now only two channel. Check my feedback!!

Used but 100% functional - and massively powerful - five channel surround amp taken from a custom home theater job. I sold the entire kit but kept this for my home theater. Crushes the five channel NAD I had - audiophile w music. Phenomenal sound. Most likely a rebranded Crown. Cannot be touched by budget or receiver amps. Definite signs of use but don’t underestimate how powerful and beautiful this amp is. It is heavy. And it is large - and thats why I am selling. I had to eliminate the home theater and am now only two channel. Check my feedback!!