- SONIC FRONTIERS SFL 1 INSTALL
- SONIC FRONTIERS SFL 1 MANUAL
- SONIC FRONTIERS SFL 1 PLUS
- SONIC FRONTIERS SFL 1 PROFESSIONAL
It appears to have the hexfreds installed, but they used a different cap along with a poly bypass. I know he is in biz to sell parts and is an honest gent, but I saw another similar unit with a power supply modded by Musicial Concepts.
SONIC FRONTIERS SFL 1 INSTALL
He advised me to replace the diodes in HV supply with 1A 600V Hexfreds and to take out the 100mfd 400V cap and install a 75 mfd. After emailing Chris at Parts Connection and being advised about working on power supply, I am a bit confused. The SFL-1 has two preamp outs, tape ins and outs, and five line-level inputs. The Sonic Frontiers SFL-1 preamp rose to fame in the 1990s as a giant-killer and was widely praised, reaching Class B on Stereophile's recommended components list. Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.Been tinkering with a SFL-1 hybrid preamp and after coupling caps changes and a new opamp, the unit is sounding pretty darn good. Sonic Frontiers, SFL-1 Linestage Preamp - SOLD 899.00 999.00 Shipping calculated at checkout. Some preamps will then move into the listening room where they will be tested with our in-house reference system. Our test bench has reference vintage KEF speakers that we are super familiar with which will quickly reveal any discrepancies. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.Īt this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching.įinal testing involves putting actual music through the preamplifier We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Special attention is paid to the power supply which is the most common source of failure for preamps. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. The unit has been in and out of PCX for few times, but came back with the same problem. We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Hi, I am also looking for the schematic for the Line 2, but mine has been to PCX for the SE+ upgrade, but has developed problems after the upgrade, static noise coming from the speakers, and no signal from the right channel in SSP mode. The SkyFi Testing Process for Preamplifiers: Vacuum-tube line preamplifier with fully differential, all-balanced circuitry, outboard power supply, and remote control of all functions with 0.5dB steps of volume and balance.
SONIC FRONTIERS SFL 1 MANUAL
Sonic Frontiers SFL-2 Preamplifier Manual FOR SALE: Sonic Frontiers SFL-1: Tube Preamplifiers: 1000.00: ON Jun 24, 2022: 4 : FOR SALE: Sonic Frontiers Tube Preamp SFL-1: Tube Preamplifiers: 990.00: ON Jun 16, 2022: 5 : FOR SALE: Solid Anthem AVM2 A/V analog preamplifier surround sound processor from Sonic Frontiers: Solid State Preamplifiers: 250. Check out the Amplitrex in action via our YouTube channel.
SONIC FRONTIERS SFL 1 PROFESSIONAL
Just cleaned and serviced by our technical staff.Īll tubes tested with our modern and professional vacuum tube tester, the Amplitrex AT-1000.
"Last but not least, and most important, crucial even, the volume attenuator is a 46-position fixed resistance array - only the best so the SFL-2 could be that good."īuilt like a tank and designed for quiet operation mostly due to the power supply being housed on a completely separate chassis.įeatures a great compliment of XLR and RCA inputs/outputs.
SONIC FRONTIERS SFL 1 PLUS
Plus you know it's something special when it's Stereophile Class A Rated *AND* featured on the fantastic vintage HiFi website The Vintage Knob!! Sounding wonderful with typical tube warmth and resolution. Gorgeous dual-chassis all tube preamp from Sonic Frontiers.