Not really a JJ fan but I’m glad it’s working well for you. It’s a wonderful pre with the right tube to match your speakers and setup. It's creamy smooth and will make ANY amp shine its brightest. Solid 9 condition - no disappointments with this piece.Ĭome check out this extraordinary component at our Lawrence showroom or purchase with confidence via this website. 500 is a steal for an SFL-1 - good for you. Over the top build and a "Sonic" signature that is pure gold. This particular SFL-1 is an exceptional representation of what Sonic Frontiers was all about.
#Sonic frontiers sfl 1 manual
It has a mono switch as well & comes complete with Owners Manual & Power Cord. One is a direct input, which bypasses any non-essential signal paths and results in a slightly more dynamic sound. The SFL-1 has two preamp outs, tape ins and outs, and five line-level inputs. Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.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. 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. We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. 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-2 Preamplifier Manual Sonic Frontiers SFL-1 line preamplifier (1395 reviewed by Dick Olsher, Vol.15 No.8, August 1992, & Vol.16 No.2, February 1993) Sonic Frontiers SFP-1 phono. 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. 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. "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 Linestage Preamp - SOLD 899.00 999.00 Shipping calculated at checkout. While a legend and rare in stock form in the UK, this unit has been upgraded further. Hybrid design using a single 12AT7 which gives a very appealing sound. This pre for sale has the latest revision (rev4) of the circuit and is the Signature version. 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!! The preamp that Sonic Frontiers made their name on, selling over 6000 units of the SFL-1. Sounding wonderful with typical tube warmth and resolution. Gorgeous dual-chassis all tube preamp from Sonic Frontiers.