frequently asked questions

In general, the answer to that question is yes.  But the degree depends on several factors.

When comparing the EQ901 B to a mint condition OEM equalizer, the differences are more subtle. If the original Bose OEM Equalizer is in less than excellent shape with aging capacitors, sliders and connectors, then the new EQ901 Bs are vastly superior. 

In general, because the EQ901 series is based on the high-performance analog device's digital signal processor, the noise and distortion are lower and the dynamic range is greater, leading to better audio performance.

In testing, our goal was to have the EQ901 series equalizers be as close as possible to the factory EQ response, with additional enhancements in dynamic and frequency range for lower noise and distortion.

All models in the EQ901 series are compared here:  EQ901 Series Selection Guide.

While it is possible to connect an active subwoofer with any of the EQ901 series equalizers, there are specific models that are designed with active crossovers to optimize the audio performance of your 901s with a subwoofer. To see a comparison of our different models and their features, check out our EQ901 Series Selection Guide.

To check out other resources on this topic, click on the following links:  EQ901  Elite / USB / Platinum Subwoofer Option Supplement and the EQ901 PS User Guide.

The purpose of the active crossover filter is to properly integrate the subwoofer with high frequency speakers, resulting in the following positive effects:

• The main speakers are relieved of their ultra low bass responsibilities, dramatically lowering distortion and improving clarity and dynamic range.
• The subwoofer is limited to its low frequency range and properly integrated with Bose 901 speakers, giving a clear, tight sound.

Contact Deer Creek Audio, we are here to help! 

Email us at staff@deercreekaudio.com.  Please include screenshots of the issues with your email.  

Call us at 720.726.9272.

When the EQ901 B arrives, it will include the EQ901 B unit along with a regulated power supply. The equalization curves for the Bose 901 series you selected will be preset on the EQ901 B unit.

The EQ901 is specifically designed for Bose 901 speakers, and although it is possible to use it with another set of speakers, it is not recommended as it would cause excessive bass and treble.

EQ901 Bs are shipped with a 0.9 Vrms input maximum rating.  This can be overdriven by tape monitor loops that are putting out more than 1 Vrms and also fixed line outputs from other components that exceed this level, such as a CD player.

One solution is to put the EQ901 B in the signal chain where you have control over the output voltage, for example a pre-out / main-in loop.  If that option is not available, you can switch the unit from 0.9 Vrms to the 2 Vrms input setting. This solution works well most of the time.

If you are still having this issue, you can return your unit to Deer Creek Audio for evaluation, with these possible outcomes:

• If the unit proves to be faulty, we will repair or exchange it.
• If the unit is operating properly, you have two options:
  • You can elect to return the unit for a 100% refund.
  • You can upgrade with a full credit to an EQ901 Elite or EQ901 USB. Both have an analog input voltage rating of up to 4 volts, and also have digital inputs such as SPDIF if, for example, your source is a CD player.
  • See our Terms and Conditions 

We offer same business day shipping for orders received by 2 PM mountain time. U.S. domestic orders for small items ship expedited (1 to 3 days), large items ship ground service (FedEx, UPS or USPS). Overnight shipping for small items is available for U.S. mainland orders. Carriers to Canada and international destinations may vary. See product listings for item-specific shipping costs.

For U.S. domestic purchases, state sales tax is only assessed for Colorado customers.  All customers outside of the United States will be responsible for any import duties and other taxes assessed by the government of the importing country. These fees are not included in our shipping charges.

The best value for our products is often via the eBay International Shipping program.  Simply add the item to your cart and you will see the full delivered price to your address including all taxes, duties and shipping.

eBay International Shipping items are first shipped from our local facility to an eBay International Shipping center. Then eBay International Shipping takes care of the rest, including completing customs forms, paying import fees and providing international shipping to you. The program also includes end-to-end international tracking, so you can stay up-to-date throughout the process. You can go to eBay and view the tracking process to your final destination.  

eBay assumes responsibility once the item reaches the eBay International Shipping center. If the item is lost or damaged during international transit, the program has you covered.

This indicates that your item is being shipped via the eBay International Shipping program to your registered address at eBay.

If you have questions or comments, you can reach us at the following:

Email:  staff@deercreekaudio.com

Telephone:  720.726.9272

Website:  deercreekaudio.com