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Cardas Frequency-Sweep and Burn-In Record

3 Reviews

Cardas Sweep Record

The Cardas Frequency Sweep and Burn-in Record is a unique tuning tool for system set-up, diagnostics and maintenance. It was produced by George Cardas and mastered by Stan Ricker. The ³Sweeper², in addition to the standard tones, includes relative and absolute polarity checks, vocal channel identification and frequency sweeps that ultrasonically clean the cartridge stylus and degauss the entire system. And, locked, pink noise grooves that repeat endlessly, blank plateaus, even a sync label to check platter speed. All on a 180 gram pressing with a smiling Stan cover.

Side 1 • Sweeper • 45 rpm. Note: This are three cuts, interleaved with smooth sections, to be played at 45 rpm. Also works at 33 1/3rd rpm.

Track 1. Short Sweeps, short version (52 seconds)


Track 2. Short Sweeps, long version (4 minutes 46 seconds)


Track 3. “I’ve Got a Feeling I’m Falling” Artists: Tom Loncaric Band. Music Thomas Waller and Harry Link. Publisher: Ann Rachel Music. (2 minutes 29 seconds)


Track 4. 1K tone (740.74Hz @ 33 1/3rd rpm)

Lead-out spiral and final tie-off

Side 2 • Burn-In • 33 1/3 rpm. Note: Burn-in is mastered at two different speeds and designed to be played at 33 1/3 rpm. The first section, from the outside edge to the lock-out groove (the stylus will stay in the groove until lifted out), is mastered at 16 2/3 rpm. Tracks 2, 3 and 4 are mastered at 22 1/2 rpm.

Track 1a. Voice announcement by George Cardas, "Greetings from the left channel" Spiral

Track 1b. Voice announcement by George Cardas, "From the right channel" Spiral

Track 1c. Voice announcement by George Cardas, "From both channels" Note: This is lateral modulation (mono, in phase). Spiral

Track 1d. "In polarity" Both channels in positive polarity Spiral

Track 1e. "Out of polarity" Both channels in reversed or negative polarity Spiral

Track 1f. 13 strikes on a high "B-flat" on a piano Note: The last of the 3 strings are brought into zero-beat, dead-on tuning. Listen for the impact of hammer on string, quickly followed by room reflections mingling with one another, followed by a keener sense of the piano sound itself, as the ring-out time of the string exceeds that of the reverb time of the room. Spiral

Track 1g. Hollow sticks, of various lengths and diameters, being struck, one on another. Note: It is recorded in a very reverberant, spacious environment. The spatial, impact and directional cues will not sound correct if the polarity is wrong.

Lock-out. Note: The remainder of this side is cut at 22.5 rpm and consists of three wide bands of pink noise, separated by two blank, 1/2 inch wide plateaus. The plateaus are protected by two blank grooves on each side, to keep the stylus from sliding into the pink noise. The three wide bands are groups of individually locked grooves of mono pink noise, recorded at "0" dB, relative to NAB standard level. These are continuous grooves and the stylus will stay in a groove until it is lifted out. This 180 gram pressing is made of specially formulated hard vinyl.

Track 2. 20 locked grooves, lateral modulation (mono)

1/2” wide, unmodulated plateau

Track 3. 32 locked grooves, vertical modulation (out-of phase)

1/2” wide, unmodulated plateau

Track 4. 20 locked grooves, lateral modulation (mono)

Track 5. 26 unmodulated grooves Note: These unmodulated grooves facilitate electro-forming (matrix) operations and help vinyl flow in the record press, for a quieter, flatter disk.

Lead-out spiral and final tie-off
  • Pressing: 180 gram, specially formulated hard vinyl
  • Mastering Lathe: Neuman VMS 66 lathe
  • Cutter Head: Helium cooled, Neuman SX-74
  • Controller: A Sontec Compudisk computer
  • Motor: Technics 5-speed direct drive Console and cutter head electronics: Keith O. Johnson
  • Ratings & Reviews

    3 reviews

    • 3 stars
    • 0 reviews
    • 2 stars
    • 0 reviews
    • 1 star
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    I love this sweep record. It realy works well. The sweeps for degousing are the best i'v used, one thing that I found was using the record at 45rpm worked better then using it at 33rpm. Get it it works..



    The break-in tracks are pretty awesome, but should be used with care. Use both the vertical and horizontal ones or you will end up with an unbalanced sound and don't do either for more than 30 minutes - it's more than enough. As for the claimed degaussing and ultrasonic cleaning tracks. I notice a very subtle improvement manifesting as a cleaner sound with more delicate transients and improved detail, but this was VERY subtle and I doubt it would pass a blinded listening test by me. Giving 4 stars as I think the benefit from this part of the record is being over-sold by the manufacturer.



    Invaluable for burning in a new or retipped cartridge, tonearm wire, tonearm cable, phono stage. Just put it on the repeating frequency sweep, turn off your speakers and let it cook for a few hours. You will notice a change after the first use and continued improvement until the new bits settle down. Worth the price for that alone.