georgehifi
Responses from georgehifi
| Preamp Noise with High-Efficiency Speakers Yingtonggao, just set the input impedance of your FL100 to the max, which is 57kohm and feed your AMR DP-777 straight in and use it's volume control, which quote is a "Direct-Coupled Analogue Volume Control." No extra caps in the signal path.This ... | |
| Preamp Noise with High-Efficiency Speakers Yingtonggao, just read this quote from Nelson Pass, I think we could all aggree that we all here with our combind wisdom pale into insignificance compared to him. Remember your FL100 takes 1.4v input to clip. Your AMR DP777 gives out more than 2v ... | |
| Preamp Noise with High-Efficiency Speakers What's wrong with just using the AMR DP-777 with it's volume control or just use a passive preamp like Lightspeed Attenuator or similar with just a pot in a box, no noise with passive pre's. And as you have such high sensitive speakers you are thr... | |
| Lightspeed Attenuator - Best Preamp Ever? Cable capacitance will not influence the overhaul volume level, but it will effect the high frequency -3db roll of point.eg: If you have 1mt interconnects from the Lightspeed to the amp that are 100pf, the -3db is at 227khzIf the the 1mt interconn... | |
| Lightspeed Attenuator - Best Preamp Ever? You want to keep your total length cable capacitance under 300pF, which most are anyway. Cable is usually spec'ed by how many pF per foot. So if you have a 3ft/1mt length, you want the cable to be spec'ed at 100pF per foot or less. And most are an... | |
| Lightspeed Attenuator - Best Preamp Ever? As for use with battery, I recommend the use of 12vdc Lithium Li_ion rechargeables, these will give a couple of week use before needing a recharge. One important question you have to ask the seller is that the plug is 2.1mm and very important that... | |
| Lightspeed Attenuator - Best Preamp Ever? This can be done Nguyen, as it is how I run it, bi-amped, both amps are 100kohm input impedance, Lightspeed sees half, 50kohm, same difference. The thing to look at is the combined input impedance of your main amp and the subwoofer amp.If your mai... | |
| Lightspeed Attenuator - Best Preamp Ever? Devilboy, Photonman seems to have found so nice low capacitance ones, Quote "I am using a 3 ft set of Bryston IC's (Canare and Neutrik) which are 21 pf/ft into the LSA and a 2 ft set of Blue Jean IC's which are 13 pf/ft out of the LSA to amp."Thes... | |
| Lightspeed Attenuator - Best Preamp Ever? Audiolabyrinth hi. All the gain 2.5v/5v switch is doing is changing the feedback resistor on the output buffer to another value to give 5v instead of 2.5 on the same output buffer. As far as being concerned that you have 5v out feeding into 3.5v i... | |
| Lightspeed Attenuator - Best Preamp Ever? You are correct Photonman, they are made of extruded aluminium, not sheet metal as you can see in the picture.lightspeedattenuator.comCheers George | |
| Lightspeed Attenuator - Best Preamp Ever? You have no gain worries now then, just flick the gain switch on the back of the Ayon to 5v go direct into the Krell from it and you will have the most transparent/dynamic sound you can get this way, with a bit of gain to spare. If you find yourse... | |
| Lightspeed Attenuator - Best Preamp Ever? http://reso.no/wp-content/uploads/2012/01/CD2s_5-300x200.jpg | |
| Lightspeed Attenuator - Best Preamp Ever? Read the above carfully before reading this. You have a switch on the back next to the output rca's and xlr's that can set the full output level at either 2.5v or 5v, I believe you have it at 2.5v from what you've been telling us.Quote from a revi... | |
| Lightspeed Attenuator - Best Preamp Ever? You will not gain anything by putting the Lightspeed into your system and I would'nt sell you one until this is sorted out. As your Krell FPB700CX has balanced inputs and is 100kohm with 3.58v sensitivity, that is, it takes 3.58v in, to take it to... | |
| Lightspeed Attenuator - Best Preamp Ever? If your Ayon has a digital domain volume control and you are able to use it within it's top 1/3 of it's full output range, so you are not "bit stripping", then only this will be even better than having a Lightspeed.Cheers George |