EQ550P-PASSIVE-TUBE-EQUALISER-PULTEQ-EQ

EQ550P-PASSIVE-TUBE-EQUALISER-PULTEQ-EQ-fp

US$299

500 Units	2	4	6+
Discount	-10%	-15%	-20%

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Categories 500 Products, Equalizers

Inspired by Famous Valve Passive EQ
Adds Harmonics and analog warmth
enhances the sound stage and content separation
Pro-Grade NOS Dual Triode
perfect for tracking and stereo bus processing
Intuitive dial-Until-You-Like operation
Designed and built for stereo use
Hybrid Tube Class A Gain Stage
Two Bands Shelf EQ Operation
Separate Control for Boost and Cut
3 Frequency Settings for HF Band
3 Frequency Settings for LF Band
Coupled with Custom HRK Active Transformer
On-Board Voltage 500 Rack PSU Filters
Direct Sale - Save on Distributors Fee!

EQ550P | CLASS A TUBE Passive Equaliser

The EQ550P is a Passive Tube-based 2 Band Shelf Equaliser inspired by the famous Pultec design.

Each Band has a separate Boost and Cut Control which allows creating the sophisticated EQ curves.

Each Boost or Cut control has three different and independent frequency settings which give a total of 9 setting combinations per Band.

The Passive filter section changes the EQ curve by attenuating the signal. The Tube gain stage restores the signal to the nominal level adding the combination of harmonics and transients.

The EQ550P is very musical and easy to use. It can process any music material, instruments, vocal or recordings, producing amazing results.

The Valve - Discrete Transistors Hybrid circuit is the result of a long development process. It produces real Tube harmonics and reaches tone while maintaining the noise on an extremely low level.

Stereo Buss Operation

1

Create Sophisticated EQ Curves!

The unique feature of Passive Equalizer is the ability to Cut and Boost at the same time.

The EQ550P can create sophisticated EQ curves which cannot be achieved by the active shelf equalizers.

The ability to select three different frequencies independently for Cut and Boost provides countless possibilities in creating custom EQ curves.

The plots below show a few examples of such EQ curves.

2

Standard Cut and Boost Curves

Like any other equalizer, the EQ550P can be used to cut or boost the shelf frequencies.

The plots below show the maximum cut and boost for each band and frequency settings.

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HRK Active Transformer

Bart Hrk developed the propitiatory design of an Active Transformer to solve the problems of the common passive transformers.

Passive transformers are susceptible to electromagnetic interferences (50Hz Hum, RF Smog) and the frequency response dependents on load and source impedance, negatively influencing the overall performance of analogue studio equipment.

The HRK Active Transformer delivers the sound that we love, including the harmonics content and the tonal response, and removes all the hassles associated with passive transformers.

The Active Transformer produces a subtle “Air” effect and provides extended LF performance.

The Active Transfomer saturation depends on the output level. Higher output signal levels will saturate the Active Transfomer more, like in the classic studio equipment.

EQ550P Demo Videos

The demo video presenting the older version of the EQ550P with a Silver front panels.

The current Black front panel version is delivers the same performance as the units presented in the video.

All videos are server hosted to insure the best quality of sound without the YouTube compression or normalization.

Play Video

Play Video

Play Video

EQ550P Specification
Input Type / Input Impedance	Balanced Electronic	20k
Output Type / Output Impedance	Balanced HRK Active Transformer	Less than 10R
Initial Gain	0dB	All controls set to flat response
Max Output Level	+25dBu@1%THD	Balanced Signal
Power Consumption	180mA max.
Format	API 500 Format
Phase Reverse	No	0 deg.
Static Noise	-89dBu@10Hz-22kHz	All controls set to flat response
Thermionic Valve	NOS Dual Triode	High Quality NOS Selected Tube

ALL HRK Products Are Brand New - Assembled and Fully Tested

All HRK Products are tested with the industry best audio measuring equipment

Audio Precision System

All Items are dispatched from Poland in the European Union within 1-3 working days.

Country / Region	Shipping Cost	Customs Fee	VAT
All 27 European Union Countries Delivery Time: 2-7 Days	– 14.99USD for orders below 299USD- FREE shipping for orders over 299USD	NO Customs Fees	– Yes, for personal orders- Not charged with the EU VAT number
United Kingdom Delivery Time: 3-7 Days	– 14.99USD for orders below 299USD- FREE shipping for orders over 299USD	NO Customs Fees	No VAT charge. HMRC collects the VAT.
USA, Canada Delivery Time: 5-10 Days	– 14.99USD for orders below 299USD- FREE shipping for orders over 299USD	NO Customs Fees for orders up to 800USD – charged by the USA Customs Office	No VAT charge.
Australia Delivery Time: 5-14 Days	– 19.99USD for orders below 399USD- FREE shipping for orders over 399USD	No info available – refer to local regulations.	No VAT charge.
Switzerland Delivery Time: 3-7 Days	– 14.99USD for orders below 299USD- FREE shipping for orders over 299USD	No info available – refer to local regulations.	No VAT charge.
Norway Delivery Time: 3-7 Days	– 14.99USD for orders below 299USD- FREE shipping for orders over 299USD	No info available – refer to local regulations.	No VAT charge.
Russia, Ukraine, Belarus – NOT AVAILABLE	NOT AVAILABLE	NOT AVAILABLE	NOT AVAILABLE
Worldwide destinations Delivery Time: 3-14 Days	– 29.99USD	Refer to local regulations.	No VAT charge.

EU Customers

The EU Customers will not pay any extra customs fees.

Business customers with valid EU VAT number will not pay the VAT tax.

Please enter your EU VAT Number at the checkout, and the VAT will be deducted from the Total Payment. The VAT number is automatically checked in the VIES database.

For personal orders from the EU, the VAT will be added at the checkout.

UK Custmers

We ship directly to United Kingdom.

UK VAT tax is collected by HRMC

Non-EU Customers

Customers from outside the EU purchase the items with no VAT.

Please select the destination country, and the VAT will be removed automatically.

If the VAT is not removed, please email customer service via the contact form, and a custom invoice will be issued.

USA and Canada

Orders from the USA below 800USD are FREE from customs tax.

We ship directly to USA and Canada

Payment Options:

You can pay for your order with any Credit Card and Apple Pay!

7 Days Return Policy

Our return policy is a part of the general Terms & Conditions, which you must acknowledge at the checkout. We stand for fair rules and a win-win approach.

We understand that our customers may wish to return the product, and we provide such an option.

However, because we are a small company, we can’t afford to run a grade B outlet shop like big distributors and providing the 30 days return period. We can’t also scrap every returned unit.

We could charge our customers more to offset the cost of the returns, and this is what major distributors do. Or we can keep our prices low and hope that our customers will appreciate our policy.

This is why we provide the 7 days test period after receiving the package with the ordered items. If you wish to return the item, we will accept the return request, providing that the item is not damaged.

If the item is damaged during the transport, we will do our best to help you and provide the replacement product.

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