jasonbourne52
Responses from jasonbourne52
| Harmon Kardon Citation XX If they are in nice shape and working go for it! The HK XX and XXP were and still are competitive with much costlier gear! I missed my chance years ago to buy the XX amp for a low price! Parts for repair are readily available. | |
| Question on Preamp Outputs. The SE2B looks real good in the photos, with its wood side panels and neat interior wiring with two Jensen transformers! Front panel has a pair of RCA jacks and a pair of XLR jacks. | |
| Question on Preamp Outputs. Success! EBay seller pinetreeaudio builds and sells a converter box using Jensen transformers for XLR -to-RCA : the Pine Tree Audio SE2B. $275 + $15 shipping. Build time 2 weeks. Located in Fitchburg, MA. Forget all the other cheap cr*p! This is t... | |
| Question on Preamp Outputs. A Jensen transformer is the best way to avoid the hot pin 3 problem - but at extra cost! | |
| Question on Preamp Outputs. Back to the topic of XLR adapters! Member almarg had a post on 2-20-2017 where he addressed this issue. He thought it was potentially a problem because of shunting pin 3 to ground at the RCA input since pin 3 is active! Possibly damaging the amp! ... | |
| Question on Preamp Outputs. Using autoformers in a present-day transistor amp is really backward engineering! Anyway the hot -or should I say cool- stuff is the interest and further development of class D amps. | |
| Question on Preamp Outputs. @kijanki : read the 462 specs again! 2.1 volts in produces 450 watts through the RCA's. 4.2 volts in through XLR's produces the same 450 watts because of the autoformer-coupled output stage. Even though gain is different from RCA vs. XLR! | |
| Question on Preamp Outputs. @kijanki : go to the top and read the specs for the 462. Either RCA or XLR it outputs 450 watts for respectively 2.1 and 4.2 volts! Not 110.25 watts for 2.4 volts! | |
| Question on Preamp Outputs. @imhififan : OK! I can follow the math - but note that the specs for the 462 state "450 watts for either 2.1 or 4.2 volts"! That's way more than 147 watts according to your math! | |
| Question on Preamp Outputs. @kijanki : look at the specs for the 462 amp! Both 2.1 and 4.2 volts both produce output wattage of 450! So if the input voltage is slightly increased to 2.4 ala the Marantz 8802 you say that the wattage will go down to 1/4 of 450!!!! | |
| Question on Preamp Outputs. @kijanki : an amp producing 25 watts is actually outputting 14 volts. At 50 watts it is outputting 20 volts. I understand this type of non-linear proportion. I don't think it applies to voltage at the input stage! | |
| Question on Preamp Outputs. @kijanki : so half of 4.2 is 2.1 volts. You say that the power in watts is 450 ÷ 4? That sounds way off! | |
| Question on Preamp Outputs. I think you will really need an adapter using a transformer to avoid having pin 3 connected to the shield ground at the amp's RCA jacks. | |
| Question on Preamp Outputs. Amazon has some adapters: GXR - 134 from zZounds for $8.65 each. However you may experience distortion when using an XLR/RCA adapter because they shunt pin 3 to ground at the unbalanced end. Pins 2 and 3 are out-of-phase signals. Some amps won't t... | |
| Question on Preamp Outputs. Let me go check out what an XLR -to- RCA adapter involves! |