For Instant Discounts! Bigger Savings Than Codes! (It's Free!)

QSC ISA-280 Professional Power Amplifier

Not In Stock Not In Stock, But We'll Order It In For You
This item is not in stock, but can usually be back in our warehouse within 4 to 10 days, depending upon stock levels at QSC. This time frame is not guaranteed, rather an estimate based on historical data. Order now! We'll notify you promptly if we hear of any delay.
Free Shipping FREE Ground Shipping to the contiguous U.S. (details)
$599.99
As low as $25/mo.
X

To apply for financing, simply add items to your cart, checkout and choose one of these financing options as the payment method. Questions? Call us at 877-435-4327 or click here to chat!


  • Designed for the individual, not a business.
  • Subject to credit approval, this process takes only seconds after which you can complete your purchase.
  • 3, 6 or 12 months to pay over time, rate range from 10-30% APR. You will see your total at check out.
  • No hidden fess or confusing terminology.
  • May be used with purchases totaling up to $17,500.
  • More details at Affirm.com

  • Can be used for purchases up to $3,000, based on your available credit.
  • Subject to credit approval, this process takes only seconds after which you can complete your purchase.
  • Easily apply for a FuturePay account in seconds during checkout. You will never need a credit card – ever.
  • At the end of every billing period you can pay your balance in full or carry your balance a month longer for as little as $5/month.
  • Your information is kept secure by using the latest in fraud prevention and security tools.
  • More details at Futurepay.com

  • Designed for the individual, not a business.
  • PayPal Credit is a line of credit from Comenity Capital Bank that gives you the flexibility to pay for your purchase now, or pay over time.
  • It’s easy to apply and easy to use. Simply choose PayPal at checkout and select PayPal credit from within your PayPal account.
  • Must have or apply for a PayPal account.
  • More details at PayPal.com
VIP Price:
    • BONUS! Buy Now and Earn 1199 PDJ Bucks ($11.99)! MUST Be Logged In! Domestic U.S. customers only. Exact value may vary once logged in.
      X

      PDJ Bucks Rewards Program

      The PlanetDJ.com Rewards Program is a fun way to earn "PDJ Bucks", or virtual currency. PDJ Bucks are awarded for making product purchases and for other actions that help support the PlanetDJ.com community and can then be redeemed on PlanetDJ.com for product discounts. As a member of PlanetDJ.com, there are lots of ways to earn and spend your PDJ Bucks. It is just one of the many ways we thank you for being a loyal customer.

      Must Be Logged In To Earn/Use PDJ Bucks! Click Here To Log In/Sign Up

      PDJ Bucks Are Applied in the "Payment Information" Section of Secure Checkout

      Earning PDJ Bucks

      There are a number of ways you can earn PDJ Bucks, as shown below. Check back often as we are always looking for new fun ways for you to earn additional points!

      Join Us

      Earn 150 PDJ Bucks for Signing Up a New Account (New Customers Only)!

      Click Here!

      Subscribe

      Earn 100 PDJ Bucks for Signing Up for Our Newsletter!

      Log In or Register To Sign Up!

      Make a Purchase

      Earn 2% Back Towards Future Purchases ($1 = 2 PDJ Bucks).

      Note: PDJ Bucks cannot be applied to or from previous orders. MUST be logged in.

      Write a Review

      Earn 50 PDJ Bucks for Submitting Product Reviews

      Limit 3 Per Day, Minimum 30 Words, Subject to Approval

      Get Friends to Join!

      Earn 50 PDJ Bucks for Each Friend that Signs Up!

      Limit 5 Registrations Per Day

      Get Friends To Purchase!

      Earn 100 PDJ Bucks for Each Friend That Makes Their First Purchase!

      Invited Friend Must Be Logged In.

      PDJ Bucks Exchange Rate

      Each one hundred (100) PDJ Bucks is valued at one ($1) US Dollar in credit or product discounts. PDJ Bucks have no redeemable cash or other value.

      Accruing PDJ Bucks

      When you have earned PDJ Bucks, they will generally be posted automatically to your Account. Some PDJ Bucks are pending until final approval. PlanetDJ.com has the full and final rights to make all decisions on all PDJ Bucks awarded and revoked. For instance, we only allow one join us award for each real person that joins PlanetDJ.com. We also do not allow friend awards for inviting yourself through other email accounts you may access. We may deny any such awards that we uncover at any time at our full discretion.

      Redeeming PDJ Bucks

      You may redeem your PDJ Bucks on product purchases, subject to the parameters outlined in Minimums and Maximums below. If you have accumulated enough PDJ Bucks to redeem, then you may apply them while in your shopping cart to get the appropriate discount.

      PDJ Bucks Minimums and Maximums

      For most purchases, PDJ bucks can be redeemed for up to 20% of the total of your purchase. In some cases there may also be a minimum number of PDJ Bucks required for any redemption. Your total PDJ Bucks accrued is capped at 5,000 ($50.00), which would require you to redeem some PDJ Bucks before earning more.

      Managing Your PDJ Bucks

      You have the ability to view and manage your PDJ Bucks from within your Customer Account. Here you will be able to view your total points (and currency equivalent), minimum amount needed to redeem, whether you have reached the maximum points limit and a cumulative history of points acquired, redeemed and lost.

      PDJ Bucks Expiration

      PDJ Bucks expire after one hundred eighty (180) days if not redeemed. We'll be sure to prompt you before they expire so you will have a chance to use them. PDJ Bucks expire in the order in which they were earned.

      How Returns Affect PDJ Bucks

      Items that are later returned will have their PDJ Bucks deducted from their earned rewards.

qsc isa-280
Images may show accessories or configurations not packaged with this item.

Be the first to review this product

Versatile loading options and a comprehensive feature set make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.

Designed as a cost-effective solution specifically for sound contractors, the ISA Series features six models including three low impedance models (ISA 280, ISA 450, ISA 750) rated for 2-ohm operation, and three "T" versions with 25, 70 and 100 volt outputs for distributed audio systems (ISA 300T, ISA 500T, ISA 800T).

Unique among distributed sound power amplifiers, the "T" versions will drive 8- or 4-ohm loads and a distributed system on the same channel simultaneously. This enables a contractor to reduce the number of required amplifier channels by allowing a limited number of distributed speakers to be attached to the same amp as is powering the main sound system.

Housed in a rugged 3-U chassis, all six models feature rear panel gain controls for tamper resistant operation with 2 dB detents for quick and repeatable settings. Inputs include both XLR and detachable Euro-style connectors. Outputs feature covered barrier strip connectors for safety agency compliance, and for added versatility, a DataPort V2 (Version 2) terminated with an HD-15 connector is provided for use with DPV2-compatible signal processing accessories such as the XC-3 Crossover, SF-3 Subwoofer Filter, LF-3 Low Frequency Filter and the DSP-3 with external power supply.

Selectable high-pass filters are included to protect speakers and prevent speaker transformer saturation with minimal effect on program material. The ISA Series provide additional protection circuitry including DC, infrasonic, thermal overload, RF and short circuit protection.

On the ISA 750 and ISA 800T, class H complementary bipolar output circuitry increases system efficiency by reducing AC power draw and waste heat by 40%. Cooling is accomplished via an automatic variable speed fan, which pulls air from back to front.

FEATURES:
• Three models for low-impedance applications
• Three "T" versions include low-impedance and 25-, 70-, and 100-volt outputs for distributed audio systems
• Rear panel gain controls for tamper resistant operation with 2-dB detents for quick and repeatable settings
• XLR and detachable Euro style input connectors
• DataPort V2 for use with DPV2-compatible signal processing accessories (XC-3, SF-3, LF-3) and DSP-3 (with external power supply)
• Independent defeatable clip limiters for reduced distortion
• Selectable high-pass filters that protect speakers and prevent speaker transformer saturation with minimal effect on program material (30 Hz or 70 Hz on non-"T" models, 50 Hz or 75 Hz on "T" models)
• Class H complementary bipolar output circuitry reduces AC power draw and waste heat by 40% (ISA 750 and 800T)
• Front panel indicators include power, signal, and clip
• Covered barrier strip output connectors for safety agency compliance
• Automatic variable-speed fan for quiet normal operation with maximum cooling on demand
• Rear-to-front air flow keeps equipment racks cool
• Stereo, Bridge, or Parallel operating modes
• Comprehensive protection circuitry including DC, infrasonic, thermal overload, and short circuit protection
• 3-year warranty plus optional 3-year extended service contract

SPECIFICATIONS:
• Power Ratings: 185W @ 8 ohms, 280W @ 4 ohms, 430W @ 2 ohms.
• 20 Hz-20 kHz: 10 dB below rated power: Less than 0.03% THD, 4 ohms and 8 ohms
• 1.0 kHz and below: full rated power: Less than 0.03% THD, 4 ohms and 8 ohms
• Frequency Response: Direct outputs: -3 dB @ 50 Hz, -0.5 dB @ 20 kHz; XF outputs: 50 Hz-16 kHz, +0/-3 dB
• Damping Factor: Greater than 200 at 8 ohms
• Input Impedance: 10 k ohms unbalanced, 20 k ohms balanced
• Input Clipping: 10 Vrms (+22 dB)
• Cooling: Continuously variable speed fan, back-to-front air flow
• Connectors Input: Active balanced; 3-pin Euro-style detachable terminal block and XLR (pin 2+); Output: Covered barrier strips; DataPort V2: HD-15 connector
• Controls: Front-AC switch, Rear-Ch. 1 and Ch. 2 gain knobs, 10-position DIP switch
• Indicators PWR-ON: Green LED SIGNAL: Green LED (1 per channel); CLIP: Red LED (1 per channel)
• Amplifier Protection: Full short circuit, open circuit, thermal, ultrasonic, and RF protection;
Stable into reactive or mismatched loads
• Load Protection On/off muting; Triac crowbar: ISA 750 and 800T; AC coupling: ISA 280, 300T, 450 and 500T
• Dimensions: 19" (48.3 cm) rack mounting, 5.25"(13.3cm) tall (3 rack spaces),
15.9" (40 cm) deep (from front mounting rails)
• Power Requirements 100, 120, 230, VAC, 50-60 Hz.

Additional Information

UPC

N/A

SKU

ISA-280

Manufacturer

QSC

Price

$599.99

Product Condition

New

Write Your Own Review

You're reviewing: QSC ISA-280 Professional Power Amplifier

How do you rate this product? *

 1 star2 stars3 stars4 stars5 stars
Quality