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Heritage Audio SYMPH EQ Master Bus Stereo Asymptotic Equalizer , $1,799.00 - Add to Cart Skip to Product Information

Heritage Audio SYMPH EQ Master Bus Stereo Asymptotic Equalizer

Stereo Asymptotic Shelving Equalizer with M-S Processing and 2-pole Highpass and Lowpass Filters
Item ID: SYMPHEQ
Heritage Audio SYMPH EQ Master Bus Stereo Asymptotic Equalizer
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Heritage Audio SYMPH EQ Master Bus Stereo Asymptotic Equalizer
In Stock!

Only 1 left in stock! Order Soon!

The Definitive Baxandall Update

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Place the Heritage Audio Symph EQ on your master bus, and you'll infuse your mixes with sweet-sounding highs and tight, natural lows. This stereo asymptotic shelving equalizer offers an exciting update to classic Baxandall-style units, with 0.5dB-precision rotary controls and M-S processing for hyper-accurate tone shaping that's guaranteed to elevate your projects. The Symph EQ exhibits a super-transparent sound with near-zero phase deviations and other sonic artifacts, and it's as simple to use as the bass and treble controls on an old-school stereo system. The Symph EQ boasts top-shelf Carnhill transformers, 73-type Class A output stages, and gold-plated XLR jacks.

Stereo asymptotic equalization explained

The Symph EQ is a stereo asymptotic equalizer, in which the boost or cut amplitude of its shelf curves increases until the asymptotic value is reached. These curves ensure that the unit's ultra-high frequencies and sub-low frequencies remain well controlled. The end result sounds tight, sweet, and natural, with exceptionally low phase deviation. It's this level of sonic transparency that makes the Symph EQ ideal for mastering duties.

M-S processing permits an unprecedented level of accuracy

At Sweetwater, we're impressed by the Heritage Audio Symph EQ's level of accuracy. All of its controls utilize high-quality, 0.5dB-precision rotary switches. Onboard M-S processing permits dead-accurate center bass management, as well as high boosting hard-panned sources without affecting center ones. What's more, when in M-S mode, the unit's side highpass filter is similar to the elliptical-type filters employed by vintage disk cutters.

High-quality components achieve hi-fidelity sound

The Symph EQ was built with top-shelf components. Carnhill input and output transformers ensure a robust, high-fidelity sound, while 73-type Class A output stages further minimize unwanted distortion. You also get balanced, ground-free I/O and gold-plated XLR jacks to ensure rock-solid connections.

Heritage Audio Symph EQ Features:

  • Stereo shelving equalizer offers an exciting update to classic Baxandall-style units
  • Super-transparent sound with near-zero phase deviations — great for mastering
  • Asymptotic EQ curves ensure well-controlled ultra-high and sub-low frequencies
  • High-quality, 0.5dB-precision rotary switches yield unprecedented accuracy
  • Onboard M-S processing permits dead-accurate center bass management and high boosting hard-panned sources without affecting center ones
  • Side highpass filter in M-S mode is similar to the elliptical-type filters employed by vintage disk cutters
  • 2-pole highpass and lowpass filters make cleaning up sources a breeze
  • Carnhill input and output transformers ensure a robust, high-fidelity sound
  • 73-type Class A output stages further minimize unwanted distortion
  • Balanced, ground-free I/O and gold-plated XLR jacks ensure rock-solid connections

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

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